Printing-press



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PRINTING PRESS.

No. 356,867. Patented Feb. 1, 1887..

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0. E. CLEMENT.

I PRINTING PRESS, No. 356,867. Patented Feb. 1, 1887.

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PRINTING mass.

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PRINTING PRESS.

No. 356,867. Patented Feb. 1,1887.

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0. E. CLEMENT.

PRINTING PRESS.

No. 356,867. Patented Feb. 1, 1887.

llnurnn drains PATENT @rrrcn.

CHARLES E. CLEMENT, OF NASHUA, NEW HAMPSHIRE.

PRlNTlNG -PRESS.

SPE CIPICATION forming part of Letters Patent No. 356,867, datedFebruary 1, 1887.

Application filed March 5, 1886.

To all whom it may concern.-

Be it known that I, Onnunns E. CLEMENT, a citizen of the United States,residing at Nashua, in the county of Hillsborough and State of NewHampshire, have invented a new and useful Printing-Press, of whichthei'ollowing isa specification.

My invention relates to double-joint priuting-presscs; and it consistsof certain constructions and combinations of parts, hereinafterdescribed and specifically claimed, whereby certain improved results andadvantages are secured.

In the accompanying drawings, Figure 1 is a side view of my invention,wherein a number of wheels are omitted and one wheel partly broken awayin order to better expose to view certain important parts. Fig. 2 isatop View, and Fig. 8 a broken vertical central section of the same inthe line a" x of Fig. 2. Fig. at isa detail View of the bed and theinking-frarne Fig. 5 is a diagram illustrating the action of thebedgear. Fig. 6 is a detail view of the piston, and Fig. 7 is a detailview of a release mechanism employed in connection with the bed-gear.

A in the drawings designates a suitable frame, to which the main ordriving shaft Bis suitably hung, with its ends extending beyond eitherside of the frame. To the ends of the main shaft B toothed wheels I),Fig. 1, are at tached, each of which gears into a pair of toothedwheels, 0 G and G O, of equal size and number of teeth. The wheels I) Z)are also of equal size and number of teeth, and thus a uniform motion ofthe whcelsC G O C will be secured. The wheels 0 G are attached to ashaft, 0, and the wheels 0 G to ashaft, 0, and both shafts are parallelwith the main shaft B and are suitably hung to the frame A. The wheels GC are provided with crank-pins 0 c and the wheels G G with crank-pins cThe crank-pins c 0 stand in one line, and the crank-pins c 0 stand inone line; but the radial position of these two lines (or two pairs ofcrank-pins) is such that when one is in the highest or lowest positionthe other occupies a middle position, or the two pairs of crankpinsstand at right angles to each other.

To each crank-pin o a connecting-rod, D, is attached, and to eachcrankpin c it connecting'rod, D, is attached. These four connect- SerialNo. 194,137. (No model.)

ing-rods are each provided with longitudinal slots d, which slotsterminate with an upward step, (1''. Beyond the steps d theconnectingrods D D D D terminate with a slope, d, for a purposehereinafter shown. By means of the slots cl the connectingrods D D D Dmove upon pins 6 of an ordinary straight printiugbed, E. when this bedis not at work; but when the bed is at work the said pins are engagedwith the steps cl.

Four suitable tension-springs, cl, hold the connecting rods 1) D D Ddown, and thus secure the engagement of the steps cl with the pins 6.The pins 2 are fastened to the bed E at or near its ends, and by thisconstruction the bed assumes a rocking motion when the wheels 0 Orevolve.

To the extreme upper and lower edges of the bed E shafts e e aresuitably hung, the shaft c being connected with the main shaft- B bymeans of miter-gears c e c c and an intermediate quillshaft, e", whichadjusts itself to the varying distance of the shafts e and B. Theseshafts c 6 are provided at their outer ends with pulleys c of equalsize, over which two belts, F, are stretched. The belts F are suitablyprovided with a number of inkingrollers, f, which in their circuit ortravel around the bed are kept close to theprintingsurface or type.

Opposite the bed E a curved platen, G, is placed upon a suitably-shapedstationary false platen, g, fastened to the end of the frame-and is heldthere by means of two bolts, g,attached to either side and about midwayof the'platen G, and two arms, 9*, pivoted to the frame A at 9 in acentral position with the wheels 0 G and with the curve of the platen.The arms 9 are provided with curved arms 9 and tap pets 9'', the armsand tappets g being in range of crank-pins g on the wheels Qwhereby theplaten is operated, as will be seen. The shaft 0 of the printing-bed Eis provided with a roller, 6*, at each end, and these two rollers travelupon the suitably-curved surfaces h of two angular arms, H, of the frameA,and thus the weight of the bed and its connecting-rods is supported,and the bed is guided and held in the proper position during its entireoperation. This operation of printing may occupy the time of aboutone-half a revolution of the whcelsO O, and it begins as soon as the I5each other.

crank-pin e arrives at the remotest point of its leverage or itsoff-point of dead leverage. At this time the crank-pin stands at thepoint of greatest leverage and the lower end of the 5 bed E touches theplaten G, which holds the paper to be printed. This first stage of operation is illustrated in Fig. 1.

As the wheels-G 0 keep on revolving, the crank-pins 0 gradually move thelower por- IO tion of the bed E away from the platen, and

the crank-pins c" draw the upper portion of the bed E toward the upperportion of the platen until it arrives at the end of its stroke, whenthe said portions of the bed and platen touch By this operation the bedE is caused to rock over the platen G from end to end and graduallyprint the paper thereon. At the same period oftime the inking-rollers fare carried over the back of the bed E, where they cannot interfere withthe printing. After this described operation of printing the bed E ismoved away from the platen G in a backwardlydnclined position, owing tothe fact that the crank-pins 0 have finished one half of theirreturnstroke, while the other crank-pins, 0 are just beginning theirreturn-stroke. Thus the bed E moves a short distance toward the arm Huntil the slopes d of the lower connectingrods, D,

o strike two ins h on the u ri ht )ortionh 3 p i p b l of the arms H,whereby the said connectingrods are moved upward and the lower pins 0are disengaged from the steps d. When the rollers 6" come in contactwith the upright 5 portion h, the slots d are in line with the pinsportions, i, of the pawls I, hung to the pins if, and turn up the lowerhook-shaped portions, 13, of the same, into which the lower pins 6 aremoved by the steps 61. Thus the slopes d gradually swing the pawls Ifrom their orig- 5 inal vertical positions into horizontal .positions,as shown in Fig. 7, whereby the lower pins e become locked to the pawlsand are held stationary. At the same time the two upper connecting-rods,D D, are moved toward the upright portions h of the arm H,

and having arrived at a proper position the upper slopes, al come incontact with two pins, 71?, on said uprights, along which pins theyslide up until the lower surfaces of the 5 connecting-rods arrive uponsaid pins and the slots d are in line with the pins 6. After the pins 0have arrived in the slots d the connecting-rods D D D D finish theirrespective return strokes and begin their forward strokes,

while the bed E is held stationary, and the inking-rollers ff travelover the printingsurface thereof and supply it with a fresh charge ofink. During the same time the crank-pins g of the wheels 0 come incontact 6 5 with the tap pets 9 of the arms 5 depress them,

and cause the arms 9 to move the platen G upward. \Vhen the bolts 9arrive near the upper edges a of the frame A, a pin, it, on one side ofthe bed enters the slot k in a head, if, of a spring-bolt, K, suitablyhung to the inside of the frame A. This spring-bolt K bears, by means ofa tension-spring, k, and a frietioir roller, it, upon a revolving cam,L, on the shaft 0. Before the pin it enters the slot k the roller itbears upon the high surface Z of the cam, and thus keeps the slot k ofthe head If in line with the approaching pin k,- but after the pin ithas fully entered the slot k a low surface, Z, of the cam L has arrivedopposite the roller 7c, and in consequence of it the bolt K is moved bythe spring nearer the axis of the cam, thereby pulling the pin 70 withit. platen G is swung over the end portion of the false platen g, asillustrated by the dotted lines in Fig. 3. Then the upstroke of the arms9 Thus the is finished, the platen G lies upon the top of the frame in asuitable posit-ion for the operator to remove the printed paper andattach a fresh sheet of blank paper. After this the stroke of theconnecting-rods D D is reversed, and their slopes d leave the pins li and release the ends 2" of the pawls I, which, by means of ordinarytensionspring, i are swung back to their normal vertical positions, andthe lower pins 6 become engaged with the steps d of the connecting-rodswith the aid ofthe tensionsprings (1 About this time the high surface Zof the cam L has arrived at the roller is, which is thus pushed back,thereby swinging the platen back upon the upper portion of the falseplaten g. The pins 9 now come in con tact with the arms 9" and forcethem away, thereby causing the arms g to movethe platen G down to itsnormal. position upon the false platen 9. During this operation theconnecting-rods D D gradually leave the pins h and as their slopes ddescend thereon the upper pins 6 and the steps (1 become again engaged,and thus the press is ready for another imprint.

The means employed for holding the paper upon the platen G are theordinary well-known means, and I have not deemed it necessary todescribe them. The same may be said about the inking apparatus supplyingthe inkingrollers f, for which almost any of the known constructionswill answer.

In the diagram Fig. 5 the successive positions of the printing-bed E atequal periods or stages of operation are shown, as when the connecting-rods and the printing-bed are permanently connected in theordinary way. In this figure the printing-bed E is shown in threepositions tangential to the curve of the platen G. The positionsavailable for printing are all lying between the two extreme tangentialpositions, and while the printing-bed is moving between these twopositions, under my present construction, it is firmly connected withthe connecting-rods D D D D, while the other five positions,which arenot available for printing, are avoided, and thus I am enabled to ICOmake my frame and the quill shaft much shorter than heretofore.

The main advantages of my press over others is a great reduction ofpressure between the bed and platen when compared with presses whichprint a whole surface at once as, for instance, a Franklin press. For asurface of ten by fifteen inches generally a pressure of about fourhundred pounds is required per square inch, and if the actualprinting-surface in my machine is not more than one-half inch byeighteen inches the pressure required for a fair imprint is only eightpounds to the square inch. Thus, while 151x400 pounds: 60,000 pounds ofpressure, and which are necessary to produceaniniprint upon a surface of10 x inches, or one hundred and fifty square inches at once, with theold or Franklin press, with my invention a surface is printed at therate of! 18,0r nine square inches successively, with eight poundspressure only to the square inch. In other words, an inst-antinipressionof one hundred and fifty square inches area requires sixty thousandpounds pressure, while the same area can be traveled over at the rate ofseventytwo pounds of pressure to nine square inches printing-areasuccessively in a short space of time.

liVhat I claim as my invention is- 1. In a printing-press,astraight-surfaced, rocking, and reciprocating bed, in combina tion witha curved platen and suitable operating parts, substantially as and forthe pur pose described.

2. The combination of the crank wheels 0 U, connecting-rods D D D D,having slots cl, with steps d, the straight printing-bed E,

having pins 6, and the arms H, having pins h" h, and locking-pawl I,substantially as and for the purpose described.

3. The combination of the rocking and reciprocal'ing printing-bed E, theinking-belts F, having inlzingrollers f, the shafts e eflhaving pulleys6 the shaft B, quillshaft 6*, and miter-wheels 6 substantially as andfor the purpose described.

4. In a printing-press, the combination of a straight oscillating bedhaving pins 6 e, a i curved platen adapted to receive equal pressarefrom the form in that position of its move ment which is required fortaking a full im' pression, the connecting-rods D D, each having slot dand step d, and the wheels 0 and C, with their connecting crank-pins ca, sub slautially as described.

5. The combination of a rocking and reciprocating straight printing-bed,the curved platen Gr, arms 9 having curved arms 9* and tappets g and thewheels C, having crankpius g, substantially as and for the purposedescribed.

6. The combination of a rocking and reciprocating straight printing-bed,a curved oscillating platen having an eccentric-pin, k, the springboltK, having a slotted head, k, and the operating-cam L, substantially asand for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES E. CLEMENT.

Witnesses:

BERNARD B. Wm-rrnironn, ELMER H. WHITE.

